Just wear what you're comfortable wearing. The problem with asking this question here is that there would appear to be to many divergent ideas as to what is acceptable and only you can truly decide for yourself what you like and want to wear. As for the actual Disney policy it's:
The parks are a casual, family-oriented environment. We suggest you dress comfortably, wear good walking shoes and check the local weather report before you leave for the parks.
Ensuring that the parks are family friendly is an important part of the Disney experience. In that spirit, we ask you to use your discretion and common sense. Attire that is not appropriate for the theme parks (and which may result in refusal of admittance) includes but is not limited to:
* Adult costumes or clothing that can be viewed as representative of an actual Disney character
* Masks (unless you are dressing up for a particular event)
* Clothing with objectionable material, including obscene language or graphics
* Excessively torn clothing
* Clothing which, by nature, exposes excessive portions of the skin that may be viewed as inappropriate for a family environment
* Objectionable tattoos
A Guest is allowed into the parks if her or his hair (or make-up, if applicable) has been made to resemble a Disney Princess or character (for example, after a Bibbidi Bobbidi Boutique makeover) provided the Guest is not also wearing a costume or clothed to look like the character.
So really what you're talking about is more than fine.